Termination w.r.t. Q of the following Term Rewriting System could not be shown:

Q restricted rewrite system:
The TRS R consists of the following rules:

f2(a, f2(x, a)) -> f2(f2(x, f2(f2(a, a), a)), a)

Q is empty.


↳ QTRS
  ↳ Non-Overlap Check

Q restricted rewrite system:
The TRS R consists of the following rules:

f2(a, f2(x, a)) -> f2(f2(x, f2(f2(a, a), a)), a)

Q is empty.

The TRS is non-overlapping. Hence, we can switch to innermost.

↳ QTRS
  ↳ Non-Overlap Check
    ↳ QTRS
      ↳ DependencyPairsProof

Q restricted rewrite system:
The TRS R consists of the following rules:

f2(a, f2(x, a)) -> f2(f2(x, f2(f2(a, a), a)), a)

The set Q consists of the following terms:

f2(a, f2(x0, a))


Using Dependency Pairs [1,13] we result in the following initial DP problem:
Q DP problem:
The TRS P consists of the following rules:

F2(a, f2(x, a)) -> F2(x, f2(f2(a, a), a))
F2(a, f2(x, a)) -> F2(a, a)
F2(a, f2(x, a)) -> F2(f2(a, a), a)
F2(a, f2(x, a)) -> F2(f2(x, f2(f2(a, a), a)), a)

The TRS R consists of the following rules:

f2(a, f2(x, a)) -> f2(f2(x, f2(f2(a, a), a)), a)

The set Q consists of the following terms:

f2(a, f2(x0, a))

We have to consider all minimal (P,Q,R)-chains.

↳ QTRS
  ↳ Non-Overlap Check
    ↳ QTRS
      ↳ DependencyPairsProof
        ↳ QDP
          ↳ DependencyGraphProof

Q DP problem:
The TRS P consists of the following rules:

F2(a, f2(x, a)) -> F2(x, f2(f2(a, a), a))
F2(a, f2(x, a)) -> F2(a, a)
F2(a, f2(x, a)) -> F2(f2(a, a), a)
F2(a, f2(x, a)) -> F2(f2(x, f2(f2(a, a), a)), a)

The TRS R consists of the following rules:

f2(a, f2(x, a)) -> f2(f2(x, f2(f2(a, a), a)), a)

The set Q consists of the following terms:

f2(a, f2(x0, a))

We have to consider all minimal (P,Q,R)-chains.
The approximation of the Dependency Graph [13,14,18] contains 1 SCC with 3 less nodes.

↳ QTRS
  ↳ Non-Overlap Check
    ↳ QTRS
      ↳ DependencyPairsProof
        ↳ QDP
          ↳ DependencyGraphProof
            ↳ QDP

Q DP problem:
The TRS P consists of the following rules:

F2(a, f2(x, a)) -> F2(x, f2(f2(a, a), a))

The TRS R consists of the following rules:

f2(a, f2(x, a)) -> f2(f2(x, f2(f2(a, a), a)), a)

The set Q consists of the following terms:

f2(a, f2(x0, a))

We have to consider all minimal (P,Q,R)-chains.